1 Department of Ophthalmology, Chung-Ang University Hospital, Chung-Ang University, College of Medicine, Seoul, South Korea.
2 Department of Ophthalmology, Asan Medical Center, University of Ulsan, College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Korea.
3 Asan Diabetes Center, Asan Medical Center, Seoul, South Korea.
4 Department of Ophthalmology, Asan Medical Center, University of Ulsan, College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Korea. j.lee@amc.seoul.kr.
5 Asan Diabetes Center, Asan Medical Center, Seoul, South Korea. j.lee@amc.seoul.kr.
6 Department of Ophthalmology, Asan Medical Center, University of Ulsan, College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Korea. yhyoon@amc.seoul.kr.
7 Asan Diabetes Center, Asan Medical Center, Seoul, South Korea. yhyoon@amc.seoul.kr.